The precision study of mark position after binarization for dynamic tests

Guoce Hu; Jin Zhang; Huaxia Deng; Liandong Yu

doi:10.1117/12.2218042

26 January 2016 The precision study of mark position after binarization for dynamic tests

Guoce Hu, Jin Zhang, Huaxia Deng, Liandong Yu

Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 99032R (2016) https://doi.org/10.1117/12.2218042
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China

Abstract

As a method of non-contact, binocular vision technique is important for vibration test. When measuring the vibrating objects, the frame rate of cameras must match the vibration frequency of the object. If the objects vibrate in high-frequency, it will lead massive image data. However, the speed of data transmission is limited by massive data. Thus, in order to deal with these data, data compression is inevitable before data transmission. Binarization is a simple and fast process to minimize the size of the image data. But the pixel locations of the marked points may change after binarization, which will inevitably affect the reconstruction of the marked points and further influence the precision of the measurement data. In this paper, the parameters which influence the position of various types of marked points are studied after binarization for dynamic test. A vibration table is employed to provide a standard moving motion. The frequency and amplitude is given by the controller of the vibration table. Three types of marked points, dot, circle and cross, are studied in this research. The obtained images in the dynamic test are minimized after binarization, and the pixel locations of the marked points are obtained. The change of pixel location is studied for the different types of the marked points with the comparison experiments and the precision of the reconstruction is investigated later.

Citation Download Citation

Guoce Hu, Jin Zhang, Huaxia Deng, and Liandong Yu "The precision study of mark position after binarization for dynamic tests", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99032R (26 January 2016); https://doi.org/10.1117/12.2218042

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KEYWORDS

Cameras

Imaging systems

3D modeling

Calibration

Image processing

Data compression

Data transmission

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